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Spawning stock biomass and fishing pressure for North Sea cod 1963-2002
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Geographical coverage note: North Sea
Note: The black line corresponds to the precautionary spawning stock biomass (SSB) level of 150 000 tonnes and the precautionary Fishing pressure of F=0.65. F is an indicator of fishing mortality represented as a logarithmic function of catch per stock of given age groups (F 2-4 means fishing mortality of year classes 2 to 4-years old), F=10 is 100 %.